CN113444423A - High-solid-content high-wear-resistance primer-topcoat metal surface anticorrosive paint and preparation method thereof - Google Patents
High-solid-content high-wear-resistance primer-topcoat metal surface anticorrosive paint and preparation method thereof Download PDFInfo
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- CN113444423A CN113444423A CN202110796825.9A CN202110796825A CN113444423A CN 113444423 A CN113444423 A CN 113444423A CN 202110796825 A CN202110796825 A CN 202110796825A CN 113444423 A CN113444423 A CN 113444423A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/32—Phosphorus-containing compounds
- C08K2003/321—Phosphates
- C08K2003/328—Phosphates of heavy metals
Abstract
The invention belongs to the technical field of coatings. A high-solid-content high-wear-resistance primer-topcoat metal surface anticorrosive paint comprises the following components in parts by mass: 35-45 parts of epoxy resin, 8-15 parts of fluorosilicone modified acrylic resin, 12-20 parts of modified epichlorohydrin resin, 5-12 parts of filler, 0.1-5 parts of auxiliary agent, 8-12 parts of curing agent, 1-5 parts of toughening agent, 1-5 parts of diluent and 3-5 parts of solvent. The paint disclosed by the invention has good base material adhesion, mechanical strength, scratch resistance, wear resistance, chemical resistance and corrosion resistance.
Description
Technical Field
The invention belongs to the technical field of coatings, and particularly relates to a primer-topcoat metal surface anticorrosive coating with high solid content and high wear resistance and a preparation method thereof.
Background
According to the functional division, the coating can be divided into a primer and a finish. The primer is used as the first layer of the coating in contact with the substrate, so that the uniform absorption of the finish paint is ensured, the adhesive force of the finish paint can be improved, the fullness of the finish paint is increased, and the alkali resistance and the corrosion resistance of the coating are improved. The finish paint is used for improving the overall effect of the paint, has higher requirements on the used materials, needs to have good chroma and brightness, and further requires a paint film to have good mechanical property, resistance and chemical resistance. The primer and the finish need to be matched for use during coating, so that the construction complexity and the construction cost are increased.
The epoxy resin is used as a main film forming substance in the anticorrosive paint, so that a paint film has good mechanical property and chemical resistance, low curing shrinkage and good adhesion to a metal substrate. The improvement of the scratch resistance and wear resistance of the existing epoxy resin anticorrosive paint film mainly depends on the addition of wear-resistant filler, but the wear-resistant filler has high brittleness and poor dispersibility in a system, and the adhesion, impact resistance and flexibility of the paint film are easily reduced by adding a large amount of the wear-resistant filler. Therefore, a primer-topcoat corrosion resistant coating having good substrate adhesion, wear resistance and corrosion resistance is needed.
Disclosure of Invention
The invention aims to solve the technical problem of providing a primer-topcoat metal surface anticorrosive coating with high solid content and high wear resistance, which has good substrate adhesion, mechanical strength, scratch resistance, wear resistance, chemical resistance and corrosion resistance.
The technical scheme of the invention is as follows:
a high-solid-content high-wear-resistance primer-topcoat metal surface anticorrosive paint comprises the following components in parts by mass: 35-45 parts of epoxy resin, 8-15 parts of fluorosilicone modified acrylic resin, 12-20 parts of modified epichlorohydrin resin, 5-12 parts of filler, 0.1-5 parts of auxiliary agent, 8-12 parts of curing agent, 1-5 parts of toughening agent, 1-5 parts of diluent and 3-5 parts of solvent.
Further, the epoxy resin is bisphenol A epoxy resin. The bisphenol A epoxy resin is used as a main film forming substance, has good compatibility with various resins, can improve the stability of a system, is not easy to layer after being blended with the various resins, and can improve the strength, the corrosion resistance and the chemical resistance of a paint film.
Further, the modified chlorinated polyether resin is prepared from the following components in parts by mass: 3-5 parts of chlorinated polyether resin, 0.1-1 part of hydroxypropyl acrylate, 4-6 parts of dimethylbenzene and 0.1-1 part of hydrogen peroxide diisopropylbenzene.
Further, the preparation method of the modified chlorinated polyether resin comprises the following steps: dissolving epichlorohydrin resin in partial dimethylbenzene, heating to 85-95 ℃, dropwise adding a mixed solution of hydroxypropyl acrylate, partial diisopropylbenzene hydroperoxide and partial dimethylbenzene, finishing dropwise adding for 1-2h, and keeping the temperature at 95-100 ℃ for 1-2 h; dropwise adding the mixture of the rest diisopropylbenzene hydroperoxide and the rest dimethylbenzene, keeping the temperature at 95-100 ℃ for 2-3h after the dropwise adding is finished for 0.5-1h, and cooling to room temperature.
The epichlorohydrin resin is modified by a monomer containing hydroxyl and carbon-carbon double bonds in the structure, so that the paint film is endowed with good weather resistance, heat resistance and chemical resistance of the epichlorohydrin resin. The hydroxyl group can generate crosslinking reaction with components such as epoxy modified phosphate ester in the system, and the compactness of a paint film is improved, so that the strength, the mechanical property and the adhesive force of a base material of the paint film are greatly improved. The hydroxyl content is high, the wetting dispersibility to the filler is good, a large amount of filler can be uniformly dispersed in the system, the sedimentation and agglomeration are not easy to occur, and the curing speed of a paint film is improved.
Further, the filler comprises the following components in a mass ratio of 1-3: the corrosion-resistant filler and the wear-resistant filler of the formula 1, wherein the corrosion-resistant filler is at least one of zirconium phosphate, aluminum tripolyphosphate and spodumene, and the wear-resistant filler is at least one of boron nitride, silicon carbide, zirconium oxide and molybdenum disilicide.
Further, the curing agent is polyamide, polyether amine and epoxy modified phosphate. The polyamide curing agent can improve the flexibility and low-temperature resistance of a paint film; the polyether amine curing agent has a certain stress relaxation effect, can reduce the curing shrinkage of a paint film, and improves the toughness, strength and impact resistance of the paint film; the combination of the two can reduce the curing temperature of the paint film and improve the curing speed. The epoxy modified phosphate can perform a crosslinking reaction with hydroxyl in a system and is bonded with the surface of metal, so that the adhesive force, mechanical strength, water resistance, salt mist resistance and chemical resistance of a paint film are greatly improved.
Further, the toughening agent is at least one of epoxy fatty acid octyl ester, tricresyl phosphate and trimellitate. The selected toughening agent does not influence the strength of the paint film while improving the flexibility of the paint film, thereby improving the impact resistance of the paint film.
Further, the diluent is phenyl glycidyl ether.
The preparation method of the primer-topcoat metal surface anticorrosive paint with high solid content and high wear resistance comprises the following steps: mixing the diluent, the solvent, the epoxy resin, the fluorosilicone modified acrylic resin and the modified epichlorohydrin resin, and stirring for 30-60 min; adding filler and stirring for 10-20 min; adding the auxiliary agent, the curing agent and the toughening agent, and stirring for 10-30 min.
The invention has the following beneficial effects:
the addition of the organic fluorine-silicon monomer in the fluorine-silicon modified acrylic resin can improve the hardness, mechanical strength, high and low temperature resistance and scratch and wear resistance of a paint film, has extremely low surface energy, and can endow the paint film with good hydrophobic and oleophobic properties, thereby improving the oxidation resistance and corrosion resistance of the paint film. The epoxy resin is used as a main film forming substance, has good compatibility with the modified epichlorohydrin resin, has good viscosity, can form a compact cross-linked network after being cured, effectively avoids the phenomenon that the fluorosilicone modified acrylic resin is unstable and easy to delaminate in a system due to low surface energy, improves the dispersibility of the filler in the system, and improves the substrate adhesive force, the mechanical strength, the scratch and wear resistance, the chemical resistance and the corrosion resistance of a paint film.
Detailed Description
The present invention will be described in detail with reference to examples, which are only preferred embodiments of the present invention and are not intended to limit the present invention.
The following table shows the formula of 3 examples and 3 comparative examples of the high-solid content and high-wear-resistance primer-topcoat metal surface anticorrosive coating of the invention (unit: mass portion):
the modified chlorinated polyether resin is prepared from the following components in parts by mass: 3 parts of chlorinated polyether resin, 0.5 part of hydroxypropyl acrylate, 5 parts of dimethylbenzene and 0.5 part of hydrogen peroxide diisopropylbenzene; the preparation method comprises the following steps: dissolving epichlorohydrin resin in partial dimethylbenzene, heating to 85 ℃, dropwise adding a mixed solution of hydroxypropyl acrylate, partial diisopropylbenzene hydroperoxide and partial dimethylbenzene, after dropwise adding for 1h, and keeping the temperature at 95 ℃ for 1 h; dropwise adding the mixture of the rest diisopropylbenzene hydroperoxide and the rest dimethylbenzene, keeping the temperature at 95 ℃ for 2 hours after the dropwise adding is finished for 0.5 hour, and cooling to room temperature.
The preparation method of the embodiment of the high-solid-content high-wear-resistance primer-topcoat metal surface anticorrosive paint comprises the following steps of: mixing the diluent, the solvent, the epoxy resin, the fluorosilicone modified acrylic resin and the modified epichlorohydrin resin, and stirring for 30 min; adding filler and stirring for 10 min; adding the auxiliary agent, the curing agent and the toughening agent, and stirring for 10 min.
The paint film performances of 2 examples and 4 comparative examples of the high-solid-content high-abrasion-resistance primer-topcoat metal surface anticorrosive paint of the invention are tested, and the test results are shown in the following tables 1-2:
the paint film has high hardness, good flexibility, good base material adhesion, impact resistance, salt spray resistance, scratch resistance, wear resistance and chemical resistance.
The high-solid-content high-wear-resistance primer-topcoat metal surface anticorrosive coating has good base material adhesive force, mechanical strength, scratch resistance, wear resistance, chemical resistance and corrosion resistance.
Claims (9)
1. The high-solid-content high-wear-resistance primer-topcoat metal surface anticorrosive paint is characterized by comprising the following components in parts by mass: 35-45 parts of epoxy resin, 8-15 parts of fluorosilicone modified acrylic resin, 12-20 parts of modified epichlorohydrin resin, 5-12 parts of filler, 0.1-5 parts of auxiliary agent, 8-12 parts of curing agent, 1-5 parts of toughening agent, 1-5 parts of diluent and 3-5 parts of solvent.
2. The high-solid-content high-abrasion-resistance primer-topcoat metal surface anticorrosive paint as claimed in claim 1, wherein the epoxy resin is bisphenol a epoxy resin.
3. The high-solid-content high-wear-resistance primer-topcoat metal surface anticorrosive paint as claimed in claim 1, wherein the modified epichlorohydrin resin is prepared from the following components in parts by mass: 3-5 parts of chlorinated polyether resin, 0.1-1 part of hydroxypropyl acrylate, 4-6 parts of dimethylbenzene and 0.1-1 part of hydrogen peroxide diisopropylbenzene.
4. The high-solid-content high-wear-resistance primer-topcoat metal surface anticorrosive paint as claimed in claim 3, wherein the preparation method of the modified chlorinated polyether resin comprises the following steps: dissolving epichlorohydrin resin in partial dimethylbenzene, heating to 85-95 ℃, dropwise adding a mixed solution of hydroxypropyl acrylate, partial diisopropylbenzene hydroperoxide and partial dimethylbenzene, finishing dropwise adding for 1-2h, and keeping the temperature at 95-100 ℃ for 1-2 h; dropwise adding the mixture of the rest diisopropylbenzene hydroperoxide and the rest dimethylbenzene, keeping the temperature at 95-100 ℃ for 2-3h after the dropwise adding is finished for 0.5-1h, and cooling to room temperature.
5. The high-solid-content high-wear-resistance primer-topcoat metal surface anticorrosive paint as claimed in claim 1, wherein the filler comprises the following components in a mass ratio of 1-3: the corrosion-resistant filler and the wear-resistant filler of the formula 1, wherein the corrosion-resistant filler is at least one of zirconium phosphate, aluminum tripolyphosphate and spodumene, and the wear-resistant filler is at least one of boron nitride, silicon carbide, zirconium oxide and molybdenum disilicide.
6. The high-solid-content high-abrasion-resistance primer-topcoat metal surface anticorrosive paint as claimed in claim 1, wherein the curing agent is polyamide, polyether amine and epoxy modified phosphate ester.
7. The high-solid content high-abrasion-resistance primer-topcoat metal surface anticorrosive paint as claimed in claim 1, wherein the flexibilizer is at least one of epoxy fatty acid octyl ester, tricresyl phosphate and trimellitate.
8. The high-solid-content high-abrasion-resistance primer-topcoat metal surface anticorrosive coating as claimed in claim 1, wherein the diluent is phenyl glycidyl ether.
9. The preparation method of the high-solid-content high-abrasion-resistance primer-topcoat metal surface anticorrosive paint disclosed by any one of claims 1 to 8 is characterized by comprising the following steps of: mixing the diluent, the solvent, the epoxy resin, the fluorosilicone modified acrylic resin and the modified epichlorohydrin resin, and stirring for 30-60 min; adding filler and stirring for 10-20 min; adding the auxiliary agent, the curing agent and the toughening agent, and stirring for 10-30 min.
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| CN202110796825.9A CN113444423A (en) | 2021-07-14 | 2021-07-14 | High-solid-content high-wear-resistance primer-topcoat metal surface anticorrosive paint and preparation method thereof |
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| CN202110796825.9A CN113444423A (en) | 2021-07-14 | 2021-07-14 | High-solid-content high-wear-resistance primer-topcoat metal surface anticorrosive paint and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113773743A (en) * | 2021-09-29 | 2021-12-10 | 惠州市惠阳区嘉泰涂料有限公司 | High-temperature-resistant aging-resistant low-VOC (volatile organic compound) polyurethane anticorrosive paint and preparation method thereof |
| CN115368806A (en) * | 2022-10-09 | 2022-11-22 | 青岛海洋新材料科技有限公司 | Anticorrosive paint applied to petroleum pipeline and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113773743A (en) * | 2021-09-29 | 2021-12-10 | 惠州市惠阳区嘉泰涂料有限公司 | High-temperature-resistant aging-resistant low-VOC (volatile organic compound) polyurethane anticorrosive paint and preparation method thereof |
| CN115368806A (en) * | 2022-10-09 | 2022-11-22 | 青岛海洋新材料科技有限公司 | Anticorrosive paint applied to petroleum pipeline and preparation method thereof |
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